Jmprovement in locks



` AUGUSTUS HHNE, of Rondout, in the county the bolt; Fig. 4 being anunder side view of y case; Fig. 5 being a view of the interior of theUNITED STATES 'PATENT Grinch. y

E. G. F. ARNDT AND AUGUSTUS HUHNE, OF RONDOUT, NEV YORK.

HMPROVEMENT IN LOCKS.

Specification forming part of Letters Patent No. 36,856, dated November1l, 18,62.

.To LLZZ whom, it may concern:

Be it known that we, E. G. F. ARNDT and of Ulster and State of New York,have invented certain new and useful Improvements on Door-Locks; and wedo hereby declare the following to be a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,and to the letters and marks thereon.

The improvements herein recited relate to a lock wherein with only onebolt. the lock may be used as a right or left hand lock, as alatch-1ock, as a night-lock, or a day-lock, the bolt being moved eitherwith or without the key. The case and the different parts of the lockmay be made of any metal commonly used in making locks, either by beingcast or wrought, or certain parts cast and the other wrought, as isusual in manufacturing locks for doors.

The drawings forming part of this specifica tion represent a door-lockhaving our improvements, Figure l thereof being a frontelevation of thelock and catch, the bolt being thrown out as used for a latchlock; Fig.2 being a like view of thelockwith the bolt thrown out to its fullestextent, as when locked, and the button for removing the bolt having beenremoved; Fig. 3 being a like view of the lock with the bolt out to itsfullest extent, and there held by the guard-plate against the button ofthe bolt with its tumblers detached fromV the lock with the bolt out asa latch-bolt, the inner plate of the lock having been removed, and Fig.6 being a like view of the lock without the inner plate, the boltbeingthrown fully out or locked.

In each of these gures,where like parts are shown, like letters andmarks are used to indicate the parts.

The case of the lock a with the catch or hasp b and the end of the boltc are so constructed that the lock may be used as a right or left handlock or latch-lock. The bolt has a coiled or helical spring, d, thetendency of which is to throw it out, secured by a pin, e, to the caseof the lock and by a like pin to the bolt. The bolt also has a pair oftumblers, f f, vibrating or susceptible of being moved on pins g g,affixed to the bolt. One of u the tuniblers has a spring, h, which tendsto force the tu mblers toward each other, and both have studs orprojections z. In one of the tumblers is a hole, j, for the button k.

Through the case of the lock, at a proper point, is a hole for the playof the hub Z of the spindle of the door-knobs. The hub Z, as is shown,has the usual spindle-pole, m, and also has a coiled or helical spring,n, attached to it by a pin at a central point, o, the spring being alsoattached by a pin, p, to the case of the lock.

Vhen' this lock is used as a latch or catch lock, the studs t' z of thetnmblers rest against the back 'portion or side of the stud g q of thehub l, and the bolt is moved backward by the usual turning of the knobsspindle, the forward movement of the bolt being produced by the actionof the spring d. The tendency of the spring a is to keep the hub Zinsuch position that its studs q q will be in a vertical line-z'. e., aline at right angles to that of the bolt c. This use of the lock isshown more particularly by Fig. 5.

Vhen used as a day-lock, the bits of the key are brought in contact withthe projection r of the one tumbler, forcing apart the tumblers, and asthe key is further turned, the hits coming in contact with theprojection s of the bolt, the bolt is moved forward to the full lockingextent, as is indicated by Fig. 6. When fully locked, as is shown byFig. 6, the studs t' il of the tumblers are in front of the studs g g of-the hub, and consequent-ly the thrust of the bolt under any effort toforce it inward will be resisted by the hub.

As a day-lock or as a night-lock, the bolt may be moved by the key fromthe outer side of the door, and also by any person within the houseV onthe inner side of the door by a stud or button, 7c, which is attached tothe tumbler, as before stated, at j. The bolt may, however, be heldsecure When'in the locked position, so that it cannot be moved by thekey by the guard-plate t, which, as is shown by Fig. 8, will prevent thebutton from being moved, and consequently hold firmly the bolt.

A curved slot, u, in the case allows the necessary motions of the buttonfor bolt or for moving it by the key.

moving the with it when operated upon What We claim as our invention,and desire to secure by Letters Patent, is-

l. The arrangement of the tuinblers f f in A their relation to the boltand to the hub so that the hub shall bear the thrust of the bolt whenpressure is made at the outer end of it, as set forth.

2. The spring n, as it is attached to and operates upon the hub, asdescribed.

3. The guard-plate t, in combination with the button k1 and tumblers ff, as herein recited.

This specification signed this 11th day of August, 1862.

E. G. F.ARNDT. AUG- .HUHNE Witness es JOHN QUIGLY, WM. LAWTON.

